/**
 作者:网络
 功能:js dom筛选器
 修正:封装特定的函数使用
 */
void function(){
    var sizzle = function(){
        var chunker = /((?:\((?:\([^()]+\)|[^()]+)+\)|\[(?:\[[^\[\]]*\]|['"][^'"]*['"]|[^\[\]'"]+)+\]|\\.|[^ >+~,(\[\\]+)+|[>+~])(\s*,\s*)?((?:.|\r|\n)*)/g,
            done = 0,
            toString = Object.prototype.toString,
            hasDuplicate = false,
            baseHasDuplicate = true;

        // Here we check if the JavaScript engine is using some sort of
        // optimization where it does not always call our comparision
        // function. If that is the case, discard the hasDuplicate value.
        // Thus far that includes Google Chrome.
        [0, 0].sort(function(){
            baseHasDuplicate = false;
            return 0;
        });

        var S = function(selector, context, results, seed) {
            results = results || [];
            context = context || document;

            var origContext = context;

            if ( context.nodeType !== 1 && context.nodeType !== 9 ) {
                return [];
            }

            if ( !selector || typeof selector !== "string" ) {
                return results;
            }

            var parts = [], m, set, checkSet, extra, prune = true, contextXML = S.isXML(context),
                soFar = selector, ret, cur, pop, i;

            // Reset the position of the chunker regexp (start from head)
            do {
                chunker.exec("");
                m = chunker.exec(soFar);

                if ( m ) {
                    soFar = m[3];

                    parts.push( m[1] );

                    if ( m[2] ) {
                        extra = m[3];
                        break;
                    }
                }
            } while ( m );

            if ( parts.length > 1 && origPOS.exec( selector ) ) {
                if ( parts.length === 2 && Expr.relative[ parts[0] ] ) {
                    set = posProcess( parts[0] + parts[1], context );
                } else {
                    set = Expr.relative[ parts[0] ] ?
                        [ context ] :
                        S( parts.shift(), context );

                    while ( parts.length ) {
                        selector = parts.shift();

                        if ( Expr.relative[ selector ] ) {
                            selector += parts.shift();
                        }

                        set = posProcess( selector, set );
                    }
                }
            } else {
                // Take a shortcut and set the context if the root selector is an ID
                // (but not if it'll be faster if the inner selector is an ID)
                if ( !seed && parts.length > 1 && context.nodeType === 9 && !contextXML &&
                    Expr.match.ID.test(parts[0]) && !Expr.match.ID.test(parts[parts.length - 1]) ) {
                    ret = S.find( parts.shift(), context, contextXML );
                    context = ret.expr ? S.filter( ret.expr, ret.set )[0] : ret.set[0];
                }

                if ( context ) {
                    ret = seed ?
                    { expr: parts.pop(), set: makeArray(seed) } :
                        S.find( parts.pop(), parts.length === 1 && (parts[0] === "~" || parts[0] === "+") && context.parentNode ? context.parentNode : context, contextXML );
                    set = ret.expr ? S.filter( ret.expr, ret.set ) : ret.set;

                    if ( parts.length > 0 ) {
                        checkSet = makeArray(set);
                    } else {
                        prune = false;
                    }

                    while ( parts.length ) {
                        cur = parts.pop();
                        pop = cur;

                        if ( !Expr.relative[ cur ] ) {
                            cur = "";
                        } else {
                            pop = parts.pop();
                        }

                        if ( pop == null ) {
                            pop = context;
                        }

                        Expr.relative[ cur ]( checkSet, pop, contextXML );
                    }
                } else {
                    checkSet = parts = [];
                }
            }

            if ( !checkSet ) {
                checkSet = set;
            }

            if ( !checkSet ) {
                S.error( cur || selector );
            }

            if ( toString.call(checkSet) === "[object Array]" ) {
                if ( !prune ) {
                    results.push.apply( results, checkSet );
                } else if ( context && context.nodeType === 1 ) {
                    for ( i = 0; checkSet[i] != null; i++ ) {
                        if ( checkSet[i] && (checkSet[i] === true || checkSet[i].nodeType === 1 && S.contains(context, checkSet[i])) ) {
                            results.push( set[i] );
                        }
                    }
                } else {
                    for ( i = 0; checkSet[i] != null; i++ ) {
                        if ( checkSet[i] && checkSet[i].nodeType === 1 ) {
                            results.push( set[i] );
                        }
                    }
                }
            } else {
                makeArray( checkSet, results );
            }

            if ( extra ) {
                S( extra, origContext, results, seed );
                S.uniqueSort( results );
            }

            return results;
        };

        S.uniqueSort = function(results){
            if ( sortOrder ) {
                hasDuplicate = baseHasDuplicate;
                results.sort(sortOrder);

                if ( hasDuplicate ) {
                    for ( var i = 1; i < results.length; i++ ) {
                        if ( results[i] === results[i-1] ) {
                            results.splice(i--, 1);
                        }
                    }
                }
            }

            return results;
        };

        S.matches = function(expr, set){
            return S(expr, null, null, set);
        };

        S.find = function(expr, context, isXML){
            var set;

            if ( !expr ) {
                return [];
            }

            for ( var i = 0, l = Expr.order.length; i < l; i++ ) {
                var type = Expr.order[i], match;

                if ( (match = Expr.leftMatch[ type ].exec( expr )) ) {
                    var left = match[1];
                    match.splice(1,1);

                    if ( left.substr( left.length - 1 ) !== "\\" ) {
                        match[1] = (match[1] || "").replace(/\\/g, "");
                        set = Expr.find[ type ]( match, context, isXML );
                        if ( set != null ) {
                            expr = expr.replace( Expr.match[ type ], "" );
                            break;
                        }
                    }
                }
            }

            if ( !set ) {
                set = context.getElementsByTagName("*");
            }

            return {set: set, expr: expr};
        };

        S.filter = function(expr, set, inplace, not){
            var old = expr, result = [], curLoop = set, match, anyFound,
                isXMLFilter = set && set[0] && S.isXML(set[0]);

            while ( expr && set.length ) {
                for ( var type in Expr.filter ) {
                    if ( (match = Expr.leftMatch[ type ].exec( expr )) != null && match[2] ) {
                        var filter = Expr.filter[ type ], found, item, left = match[1];
                        anyFound = false;

                        match.splice(1,1);

                        if ( left.substr( left.length - 1 ) === "\\" ) {
                            continue;
                        }

                        if ( curLoop === result ) {
                            result = [];
                        }

                        if ( Expr.preFilter[ type ] ) {
                            match = Expr.preFilter[ type ]( match, curLoop, inplace, result, not, isXMLFilter );

                            if ( !match ) {
                                anyFound = found = true;
                            } else if ( match === true ) {
                                continue;
                            }
                        }

                        if ( match ) {
                            for ( var i = 0; (item = curLoop[i]) != null; i++ ) {
                                if ( item ) {
                                    found = filter( item, match, i, curLoop );
                                    var pass = not ^ !!found;

                                    if ( inplace && found != null ) {
                                        if ( pass ) {
                                            anyFound = true;
                                        } else {
                                            curLoop[i] = false;
                                        }
                                    } else if ( pass ) {
                                        result.push( item );
                                        anyFound = true;
                                    }
                                }
                            }
                        }

                        if ( found !== undefined ) {
                            if ( !inplace ) {
                                curLoop = result;
                            }

                            expr = expr.replace( Expr.match[ type ], "" );

                            if ( !anyFound ) {
                                return [];
                            }

                            break;
                        }
                    }
                }

                // Improper expression
                if ( expr === old ) {
                    if ( anyFound == null ) {
                        S.error( expr );
                    } else {
                        break;
                    }
                }

                old = expr;
            }

            return curLoop;
        };

        S.error = function( msg ) {
            throw "Syntax error, unrecognized expression: " + msg;
        };

        var Expr = S.selectors = {
            order: [ "ID", "NAME", "TAG" ],
            match: {
                ID: /#((?:[\w\u00c0-\uFFFF\-]|\\.)+)/,
                CLASS: /\.((?:[\w\u00c0-\uFFFF\-]|\\.)+)/,
                NAME: /\[name=['"]*((?:[\w\u00c0-\uFFFF\-]|\\.)+)['"]*\]/,
                ATTR: /\[\s*((?:[\w\u00c0-\uFFFF\-]|\\.)+)\s*(?:(\S?=)\s*(['"]*)(.*?)\3|)\s*\]/,
                TAG: /^((?:[\w\u00c0-\uFFFF\*\-]|\\.)+)/,
                CHILD: /:(only|nth|last|first)-child(?:\((even|odd|[\dn+\-]*)\))?/,
                POS: /:(nth|eq|gt|lt|first|last|even|odd)(?:\((\d*)\))?(?=[^\-]|$)/,
                PSEUDO: /:((?:[\w\u00c0-\uFFFF\-]|\\.)+)(?:\((['"]?)((?:\([^\)]+\)|[^\(\)]*)+)\2\))?/
            },
            leftMatch: {},
            attrMap: {
                "class": "className",
                "for": "htmlFor"
            },
            attrHandle: {
                href: function(elem){
                    return elem.getAttribute("href");
                }
            },
            relative: {
                "+": function(checkSet, part){
                    var isPartStr = typeof part === "string",
                        isTag = isPartStr && !/\W/.test(part),
                        isPartStrNotTag = isPartStr && !isTag;

                    if ( isTag ) {
                        part = part.toLowerCase();
                    }

                    for ( var i = 0, l = checkSet.length, elem; i < l; i++ ) {
                        if ( (elem = checkSet[i]) ) {
                            while ( (elem = elem.previousSibling) && elem.nodeType !== 1 ) {}

                            checkSet[i] = isPartStrNotTag || elem && elem.nodeName.toLowerCase() === part ?
                            elem || false :
                            elem === part;
                        }
                    }

                    if ( isPartStrNotTag ) {
                        S.filter( part, checkSet, true );
                    }
                },
                ">": function(checkSet, part){
                    var isPartStr = typeof part === "string",
                        elem, i = 0, l = checkSet.length;

                    if ( isPartStr && !/\W/.test(part) ) {
                        part = part.toLowerCase();

                        for ( ; i < l; i++ ) {
                            elem = checkSet[i];
                            if ( elem ) {
                                var parent = elem.parentNode;
                                checkSet[i] = parent.nodeName.toLowerCase() === part ? parent : false;
                            }
                        }
                    } else {
                        for ( ; i < l; i++ ) {
                            elem = checkSet[i];
                            if ( elem ) {
                                checkSet[i] = isPartStr ?
                                    elem.parentNode :
                                elem.parentNode === part;
                            }
                        }

                        if ( isPartStr ) {
                            S.filter( part, checkSet, true );
                        }
                    }
                },
                "": function(checkSet, part, isXML){
                    var doneName = done++, checkFn = dirCheck, nodeCheck;

                    if ( typeof part === "string" && !/\W/.test(part) ) {
                        part = part.toLowerCase();
                        nodeCheck = part;
                        checkFn = dirNodeCheck;
                    }

                    checkFn("parentNode", part, doneName, checkSet, nodeCheck, isXML);
                },
                "~": function(checkSet, part, isXML){
                    var doneName = done++, checkFn = dirCheck, nodeCheck;

                    if ( typeof part === "string" && !/\W/.test(part) ) {
                        part = part.toLowerCase();
                        nodeCheck = part;
                        checkFn = dirNodeCheck;
                    }

                    checkFn("previousSibling", part, doneName, checkSet, nodeCheck, isXML);
                }
            },
            find: {
                ID: function(match, context, isXML){
                    if ( typeof context.getElementById !== "undefined" && !isXML ) {
                        var m = context.getElementById(match[1]);
                        return m ? [m] : [];
                    }
                    return [];
                },
                NAME: function(match, context){
                    if ( typeof context.getElementsByName !== "undefined" ) {
                        var ret = [], results = context.getElementsByName(match[1]);

                        for ( var i = 0, l = results.length; i < l; i++ ) {
                            if ( results[i].getAttribute("name") === match[1] ) {
                                ret.push( results[i] );
                            }
                        }

                        return ret.length === 0 ? null : ret;
                    }
                    return null;
                },
                TAG: function(match, context){
                    return context.getElementsByTagName(match[1]);
                }
            },
            preFilter: {
                CLASS: function(match, curLoop, inplace, result, not, isXML){
                    match = " " + match[1].replace(/\\/g, "") + " ";

                    if ( isXML ) {
                        return match;
                    }

                    for ( var i = 0, elem; (elem = curLoop[i]) != null; i++ ) {
                        if ( elem ) {
                            if ( not ^ (elem.className && (" " + elem.className + " ").replace(/[\t\n]/g, " ").indexOf(match) >= 0) ) {
                                if ( !inplace ) {
                                    result.push( elem );
                                }
                            } else if ( inplace ) {
                                curLoop[i] = false;
                            }
                        }
                    }

                    return false;
                },
                ID: function(match){
                    return match[1].replace(/\\/g, "");
                },
                TAG: function(match, curLoop){
                    return match[1].toLowerCase();
                },
                CHILD: function(match){
                    if ( match[1] === "nth" ) {
                        // parse equations like 'even', 'odd', '5', '2n', '3n+2', '4n-1', '-n+6'
                        var test = /(-?)(\d*)n((?:\+|-)?\d*)/.exec(
                            match[2] === "even" && "2n" || match[2] === "odd" && "2n+1" ||
                            !/\D/.test( match[2] ) && "0n+" + match[2] || match[2]);

                        // calculate the numbers (first)n+(last) including if they are negative
                        match[2] = (test[1] + (test[2] || 1)) - 0;
                        match[3] = test[3] - 0;
                    }

                    // TODO: Move to normal caching system
                    match[0] = done++;

                    return match;
                },
                ATTR: function(match, curLoop, inplace, result, not, isXML){
                    var name = match[1].replace(/\\/g, "");

                    if ( !isXML && Expr.attrMap[name] ) {
                        match[1] = Expr.attrMap[name];
                    }

                    if ( match[2] === "~=" ) {
                        match[4] = " " + match[4] + " ";
                    }

                    return match;
                },
                PSEUDO: function(match, curLoop, inplace, result, not){
                    if ( match[1] === "not" ) {
                        // If we're dealing with a complex expression, or a simple one
                        if ( ( chunker.exec(match[3]) || "" ).length > 1 || /^\w/.test(match[3]) ) {
                            match[3] = S(match[3], null, null, curLoop);
                        } else {
                            var ret = S.filter(match[3], curLoop, inplace, true ^ not);
                            if ( !inplace ) {
                                result.push.apply( result, ret );
                            }
                            return false;
                        }
                    } else if ( Expr.match.POS.test( match[0] ) || Expr.match.CHILD.test( match[0] ) ) {
                        return true;
                    }

                    return match;
                },
                POS: function(match){
                    match.unshift( true );
                    return match;
                }
            },
            filters: {
                enabled: function(elem){
                    return elem.disabled === false && elem.type !== "hidden";
                },
                disabled: function(elem){
                    return elem.disabled === true;
                },
                checked: function(elem){
                    return elem.checked === true;
                },
                selected: function(elem){
                    // Accessing this property makes selected-by-default
                    // options in Safari work properly
                    elem.parentNode.selectedIndex;
                    return elem.selected === true;
                },
                parent: function(elem){
                    return !!elem.firstChild;
                },
                empty: function(elem){
                    return !elem.firstChild;
                },
                has: function(elem, i, match){
                    return !!S( match[3], elem ).length;
                },
                header: function(elem){
                    return (/h\d/i).test( elem.nodeName );
                },
                text: function(elem){
                    return "text" === elem.type;
                },
                radio: function(elem){
                    return "radio" === elem.type;
                },
                checkbox: function(elem){
                    return "checkbox" === elem.type;
                },
                file: function(elem){
                    return "file" === elem.type;
                },
                password: function(elem){
                    return "password" === elem.type;
                },
                submit: function(elem){
                    return "submit" === elem.type;
                },
                image: function(elem){
                    return "image" === elem.type;
                },
                reset: function(elem){
                    return "reset" === elem.type;
                },
                button: function(elem){
                    return "button" === elem.type || elem.nodeName.toLowerCase() === "button";
                },
                input: function(elem){
                    return (/input|select|textarea|button/i).test(elem.nodeName);
                }
            },
            setFilters: {
                first: function(elem, i){
                    return i === 0;
                },
                last: function(elem, i, match, array){
                    return i === array.length - 1;
                },
                even: function(elem, i){
                    return i % 2 === 0;
                },
                odd: function(elem, i){
                    return i % 2 === 1;
                },
                lt: function(elem, i, match){
                    return i < match[3] - 0;
                },
                gt: function(elem, i, match){
                    return i > match[3] - 0;
                },
                nth: function(elem, i, match){
                    return match[3] - 0 === i;
                },
                eq: function(elem, i, match){
                    return match[3] - 0 === i;
                }
            },
            filter: {
                PSEUDO: function(elem, match, i, array){
                    var name = match[1], filter = Expr.filters[ name ];

                    if ( filter ) {
                        return filter( elem, i, match, array );
                    } else if ( name === "contains" ) {
                        return (elem.textContent || elem.innerText || S.getText([ elem ]) || "").indexOf(match[3]) >= 0;
                    } else if ( name === "not" ) {
                        var not = match[3];

                        for ( var j = 0, l = not.length; j < l; j++ ) {
                            if ( not[j] === elem ) {
                                return false;
                            }
                        }

                        return true;
                    } else {
                        S.error( "Syntax error, unrecognized expression: " + name );
                        return false;
                    }
                },
                CHILD: function(elem, match){
                    var type = match[1], node = elem;
                    switch (type) {
                        case 'only':
                        case 'first':
                            while ( (node = node.previousSibling) )	 {
                                if ( node.nodeType === 1 ) {
                                    return false;
                                }
                            }
                            if ( type === "first" ) {
                                return true;
                            }
                            node = elem;
                        case 'last':
                            while ( (node = node.nextSibling) )	 {
                                if ( node.nodeType === 1 ) {
                                    return false;
                                }
                            }
                            return true;
                        case 'nth':
                            var first = match[2], last = match[3];

                            if ( first === 1 && last === 0 ) {
                                return true;
                            }

                            var doneName = match[0],
                                parent = elem.parentNode;

                            if ( parent && (parent.sizcache !== doneName || !elem.nodeIndex) ) {
                                var count = 0;
                                for ( node = parent.firstChild; node; node = node.nextSibling ) {
                                    if ( node.nodeType === 1 ) {
                                        node.nodeIndex = ++count;
                                    }
                                }
                                parent.sizcache = doneName;
                            }

                            var diff = elem.nodeIndex - last;
                            if ( first === 0 ) {
                                return diff === 0;
                            } else {
                                return ( diff % first === 0 && diff / first >= 0 );
                            }
                    }
                },
                ID: function(elem, match){
                    return elem.nodeType === 1 && elem.getAttribute("id") === match;
                },
                TAG: function(elem, match){
                    return (match === "*" && elem.nodeType === 1) || elem.nodeName.toLowerCase() === match;
                },
                CLASS: function(elem, match){
                    return (" " + (elem.className || elem.getAttribute("class")) + " ")
                            .indexOf( match ) > -1;
                },
                ATTR: function(elem, match){
                    var name = match[1],
                        result = Expr.attrHandle[ name ] ?
                            Expr.attrHandle[ name ]( elem ) :
                            elem[ name ] != null ?
                                elem[ name ] :
                                elem.getAttribute( name ),
                        value = result + "",
                        type = match[2],
                        check = match[4];

                    return result == null ?
                    type === "!=" :
                        type === "=" ?
                        value === check :
                            type === "*=" ?
                            value.indexOf(check) >= 0 :
                                type === "~=" ?
                                (" " + value + " ").indexOf(check) >= 0 :
                                    !check ?
                                    value && result !== false :
                                        type === "!=" ?
                                        value !== check :
                                            type === "^=" ?
                                            value.indexOf(check) === 0 :
                                                type === "$=" ?
                                                value.substr(value.length - check.length) === check :
                                                    type === "|=" ?
                                                    value === check || value.substr(0, check.length + 1) === check + "-" :
                                                        false;
                },
                POS: function(elem, match, i, array){
                    var name = match[2], filter = Expr.setFilters[ name ];

                    if ( filter ) {
                        return filter( elem, i, match, array );
                    }
                    return null;
                }
            }
        };

        var origPOS = Expr.match.POS,
            fescape = function(all, num){
                return "\\" + (num - 0 + 1);
            };

        for ( var type in Expr.match ) {
            Expr.match[ type ] = new RegExp( Expr.match[ type ].source + (/(?![^\[]*\])(?![^\(]*\))/.source) );
            Expr.leftMatch[ type ] = new RegExp( /(^(?:.|\r|\n)*?)/.source + Expr.match[ type ].source.replace(/\\(\d+)/g, fescape) );
        }

        var makeArray = function(array, results) {
            var ret = results || [];

            if( toString.call(array) === "[object Array]" ) {
                Array.prototype.push.apply( ret, array );
                return ret;
            }
            try{
                array = Array.prototype.slice.call( array, 0 );
                if( results ){
                    results.push.apply( results, array );
                    return results;
                }
                return array;
            }catch(e){
                var i = 0;
                if( typeof array.length === "number" ) {
                    for ( var l = array.length; i < l; i++ ) {
                        ret.push( array[i] );
                    }
                }
                else {
                    for( ; array[i]; i++ ) {
                        ret.push( array[i] );
                    }
                }
            }
            return ret;
        };

        var sortOrder;

        if ( document.documentElement.compareDocumentPosition ) {
            sortOrder = function( a, b ) {
                if ( !a.compareDocumentPosition || !b.compareDocumentPosition ) {
                    if ( a == b ) {
                        hasDuplicate = true;
                    }
                    return a.compareDocumentPosition ? -1 : 1;
                }

                var ret = a.compareDocumentPosition(b) & 4 ? -1 : a === b ? 0 : 1;
                if ( ret === 0 ) {
                    hasDuplicate = true;
                }
                return ret;
            };
        } else if ( "sourceIndex" in document.documentElement ) {
            sortOrder = function( a, b ) {
                if ( !a.sourceIndex || !b.sourceIndex ) {
                    if ( a == b ) {
                        hasDuplicate = true;
                    }
                    return a.sourceIndex ? -1 : 1;
                }

                var ret = a.sourceIndex - b.sourceIndex;
                if ( ret === 0 ) {
                    hasDuplicate = true;
                }
                return ret;
            };
        } else if ( document.createRange ) {
            sortOrder = function( a, b ) {
                if ( !a.ownerDocument || !b.ownerDocument ) {
                    if ( a == b ) {
                        hasDuplicate = true;
                    }
                    return a.ownerDocument ? -1 : 1;
                }

                var aRange = a.ownerDocument.createRange(), bRange = b.ownerDocument.createRange();
                aRange.setStart(a, 0);
                aRange.setEnd(a, 0);
                bRange.setStart(b, 0);
                bRange.setEnd(b, 0);
                var ret = aRange.compareBoundaryPoints(Range.START_TO_END, bRange);
                if ( ret === 0 ) {
                    hasDuplicate = true;
                }
                return ret;
            };
        }

        // Utility function for retreiving the text value of an array of DOM nodes
        S.getText = function( elems ) {
            var ret = "", elem;

            for ( var i = 0; elems[i]; i++ ) {
                elem = elems[i];

                // Get the text from text nodes and CDATA nodes
                if ( elem.nodeType === 3 || elem.nodeType === 4 ) {
                    ret += elem.nodeValue;

                    // Traverse everything else, except comment nodes
                } else if ( elem.nodeType !== 8 ) {
                    ret += S.getText( elem.childNodes );
                }
            }

            return ret;
        };

        // Check to see if the browser returns elements by name when
        // querying by getElementById (and provide a workaround)
        (function(){
            // We're going to inject a fake input element with a specified name
            var form = document.createElement("div"),
                id = "script" + (new Date()).getTime();
            form.innerHTML = "<a name='" + id + "'/>";

            // Inject it into the root element, check its status, and remove it quickly
            var root = document.documentElement;
            root.insertBefore( form, root.firstChild );

            // The workaround has to do additional checks after a getElementById
            // Which slows things down for other browsers (hence the branching)
            if ( document.getElementById( id ) ) {
                Expr.find.ID = function(match, context, isXML){
                    if ( typeof context.getElementById !== "undefined" && !isXML ) {
                        var m = context.getElementById(match[1]);
                        return m ? m.id === match[1] || typeof m.getAttributeNode !== "undefined" && m.getAttributeNode("id").nodeValue === match[1] ? [m] : undefined : [];
                    }
                    return undefined;
                };

                Expr.filter.ID = function(elem, match){
                    var node = typeof elem.getAttributeNode !== "undefined" && elem.getAttributeNode("id");
                    return elem.nodeType === 1 && node && node.nodeValue === match;
                };
            }

            root.removeChild( form );
            root = form = null; // release memory in IE
        })();

        (function(){
            // Check to see if the browser returns only elements
            // when doing getElementsByTagName("*")

            // Create a fake element
            var div = document.createElement("div");
            div.appendChild( document.createComment("") );

            // Make sure no comments are found
            if ( div.getElementsByTagName("*").length > 0 ) {
                Expr.find.TAG = function(match, context){
                    var results = context.getElementsByTagName(match[1]);

                    // Filter out possible comments
                    if ( match[1] === "*" ) {
                        var tmp = [];

                        for ( var i = 0; results[i]; i++ ) {
                            if ( results[i].nodeType === 1 ) {
                                tmp.push( results[i] );
                            }
                        }

                        results = tmp;
                    }

                    return results;
                };
            }

            // Check to see if an attribute returns normalized href attributes
            div.innerHTML = "<a href='#'></a>";
            if ( div.firstChild && typeof div.firstChild.getAttribute !== "undefined" &&
                div.firstChild.getAttribute("href") !== "#" ) {
                Expr.attrHandle.href = function(elem){
                    return elem.getAttribute("href", 2);
                };
            }

            div = null; // release memory in IE
        })();

        if ( document.querySelectorAll ) {
            (function(){
                var oldS = S, div = document.createElement("div");
                div.innerHTML = "<p class='TEST'></p>";

                // Safari can't handle uppercase or unicode characters when
                // in quirks mode.
                if ( div.querySelectorAll && div.querySelectorAll(".TEST").length === 0 ) {
                    return;
                }

                S = function(query, context, extra, seed){
                    context = context || document;

                    // Only use querySelectorAll on non-XML documents
                    // (ID selectors don't work in non-HTML documents)
                    if ( !seed && context.nodeType === 9 && !S.isXML(context) ) {
                        try {
                            return makeArray( context.querySelectorAll(query), extra );
                        }catch(e){}
                    }

                    return oldS(query, context, extra, seed);
                };

                for ( var prop in oldS ) {
                    S[ prop ] = oldS[ prop ];
                }

                div = null; // release memory in IE
            })();
        }

        (function(){
            var div = document.createElement("div");

            div.innerHTML = "<div class='test e'></div><div class='test'></div>";

            // Opera can't find a second classname (in 9.6)
            // Also, make sure that getElementsByClassName actually exists
            if ( !div.getElementsByClassName || div.getElementsByClassName("e").length === 0 ) {
                return;
            }

            // Safari caches class attributes, doesn't catch changes (in 3.2)
            div.lastChild.className = "e";

            if ( div.getElementsByClassName("e").length === 1 ) {
                return;
            }

            Expr.order.splice(1, 0, "CLASS");
            Expr.find.CLASS = function(match, context, isXML) {
                if ( typeof context.getElementsByClassName !== "undefined" && !isXML ) {
                    return context.getElementsByClassName(match[1]);
                }
                return [];
            };

            div = null; // release memory in IE
        })();

        function dirNodeCheck( dir, cur, doneName, checkSet, nodeCheck, isXML ) {
            for ( var i = 0, l = checkSet.length; i < l; i++ ) {
                var elem = checkSet[i];
                if ( elem ) {
                    elem = elem[dir];
                    var match = false;

                    while ( elem ) {
                        if ( elem.sizcache === doneName ) {
                            match = checkSet[elem.sizset];
                            break;
                        }

                        if ( elem.nodeType === 1 && !isXML ){
                            elem.sizcache = doneName;
                            elem.sizset = i;
                        }

                        if ( elem.nodeName.toLowerCase() === cur ) {
                            match = elem;
                            break;
                        }

                        elem = elem[dir];
                    }

                    checkSet[i] = match;
                }
            }
        }

        function dirCheck( dir, cur, doneName, checkSet, nodeCheck, isXML ) {
            for ( var i = 0, l = checkSet.length; i < l; i++ ) {
                var elem = checkSet[i];
                if ( elem ) {
                    elem = elem[dir];
                    var match = false;

                    while ( elem ) {
                        if ( elem.sizcache === doneName ) {
                            match = checkSet[elem.sizset];
                            break;
                        }

                        if ( elem.nodeType === 1 ) {
                            if ( !isXML ) {
                                elem.sizcache = doneName;
                                elem.sizset = i;
                            }
                            if ( typeof cur !== "string" ) {
                                if ( elem === cur ) {
                                    match = true;
                                    break;
                                }

                            } else if ( S.filter( cur, [elem] ).length > 0 ) {
                                match = elem;
                                break;
                            }
                        }

                        elem = elem[dir];
                    }

                    checkSet[i] = match;
                }
            }
        }

        S.contains = document.compareDocumentPosition ? function(a, b){
            return !!(a.compareDocumentPosition(b) & 16);
        } : function(a, b){
            return a !== b && (a.contains ? a.contains(b) : true);
        };

        S.isXML = function(elem){
            // documentElement is verified for cases where it doesn't yet exist
            // (such as loading iframes in IE - #4833)
            var documentElement = (elem ? elem.ownerDocument || elem : 0).documentElement;
            return documentElement ? documentElement.nodeName !== "HTML" : false;
        };

        var posProcess = function(selector, context){
            var tmpSet = [], later = "", match,
                root = context.nodeType ? [context] : context;

            // Position selectors must be done after the filter
            // And so must :not(positional) so we move all PSEUDOs to the end
            while ( (match = Expr.match.PSEUDO.exec( selector )) ) {
                later += match[0];
                selector = selector.replace( Expr.match.PSEUDO, "" );
            }

            selector = Expr.relative[selector] ? selector + "*" : selector;

            for ( var i = 0, l = root.length; i < l; i++ ) {
                S( selector, root[i], tmpSet );
            }

            return S.filter( later, tmpSet );
        };
        return S;
    }();
    //封装模式
    sky.define(function(require){
        var $$;
        function $(){
            var rv = sizzle.apply(window,arguments);
            //判断是否加载了 dom 如果加载，启动扩展属性
            if(!$$){
                $$ = require('dom') || {};
            }
            if($$.query){
                // 已经有，加入方法
                $$.query(rv);
            }
            return rv;
        }
        return $;
    });
}();